CN104777373A - High-vacuum solid insulation surface charge measuring probe control system - Google Patents
High-vacuum solid insulation surface charge measuring probe control system Download PDFInfo
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- CN104777373A CN104777373A CN201510142803.5A CN201510142803A CN104777373A CN 104777373 A CN104777373 A CN 104777373A CN 201510142803 A CN201510142803 A CN 201510142803A CN 104777373 A CN104777373 A CN 104777373A
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Abstract
The invention discloses a high-vacuum solid insulation surface charge measuring probe control system and belongs to the field of electrostatic measurement. The measuring probe control system comprises an electrostatic capacitor probe bracket comprising a probe sliding track and a slope support, an electrostatic capacitor probe movement control mechanism comprising a spring mechanism and a pull-down connecting rod as well as a high-vacuum system, wherein in the high-vacuum system, a to-be-measured solid insulation test object is placed between a high-voltage electrode and a ground electrode; the pull-down connecting rod is in dynamic seal fixation with a bottom plate of the high-vacuum system through a magnetic fluid. An electrostatic capacitor probe is controlled to be away from or get close to the solid insulation test object by the aid of mechanical drive control components such as the spring mechanism, the pull-down connecting rod, a rotating shaft, a gear mechanism and the like, and the distance between the electrostatic capacitor probe and the solid insulation surface is kept constant by means of the slope support; high-vacuum dynamic seal is realized by the aid of a magnetic fluid sealing technology, control movement outside a vacuum testing cavity is transferred into the cavity, and meanwhile, the vacuum degree is not affected.
Description
Technical field
The invention belongs to electrostatic measurement category, particularly a kind of high vacuum insulator surface measuring sonde control system.
Background technology
Vacuum and solid insulation be the weakest link of whole insulation system along face.The surface charge accumulation at vacuum-solid insulation interface can change the Electric Field Distribution of insulation system, so affect insulation system along face withstand voltage level.Therefore, the measurement of vacuum solid insulation surface charge is significant.
The measurement of surface charge belongs to the category of electrostatic measurement, and the electrical instrument often had thus can not be used to measure.The measuring method of surface charge mainly contains: soot technique, pulse electroacoustic method, supercritical ultrasonics technology, Pockels effect method, capacitance probe method etc.But existing method has obvious deficiency, soot technique can not carry out quantitative measurment, the equipment complex and expensive of pulse electroacoustic method, and is only applicable to the charge measurement of two solid interface, and supercritical ultrasonics technology and Pockels effect method are only applicable to the measurement of film-insulated test product.Capacitance probe method is divided into dynamic condenser probe method and static capacity probe method two kinds.In order to ensure Measurement Resolution, require that the entrance capacitance value of the capacitance of probe in dynamic condenser probe method itself and measurement circuit is very stable, and this is difficult to realize.In addition, the method is not suitable for the measurement of complicated shape insulator yet.Therefore the current charge measurement for solid surface in gas-solid interface or vacuum, static capacity probe method is the most feasible implementation.
The process of measurement of static capacity probe method is generally and first makes static capacity pop one's head in away from tested solid insulation test product and high-field electrode to guarantee equipment and personal safety, static capacity is popped one's head in carry out the measurement of surface charge near tested solid insulation test product removing impressed voltage.Insulator typical case shape body conventional in engineering under vacuum environment is 45 ° of truncated cone-shaped, and the constant distance on the probe that static capacity will be kept during measurement to pop one's head in and 45 ° of truncated cone-shaped tested solid insulation test product surfaces is constant.This just requires a set of mechanical manipulation system and can control static capacity and to have popped one's head in above-mentioned motion.
Be different from atmospheric environment and SF
6deng the surface charge measurement in hyperbaric environment, all motions in high vacuum experimental enviroment all need to control in the external realization of high vacuum test cavity under the prerequisite not destroying high vacuum test condition, and this has higher requirement with regard to giving the design and implimentation of whole probe control system.
Summary of the invention
The object of the invention is to propose a kind of high vacuum insulator surface measuring sonde control system, measuring sonde control system is made up of static capacity probe bracket, static capacity probe movement operating-controlling mechanism and high vacuum system; It is characterized in that, in high vacuum system, on top board high-field electrode 5 and ground electrode 7 being fixed vacuum test chamber respectively by contact conductor 10 and base plate, tested solid insulation test product is placed between high-field electrode and ground electrode; Static capacity probe is fixed on probe slide rail top, the lower end of probe slide rail is movably fixed to high vacuum by rotating shaft and moves on the base plate of system, inclined-plane is supported and fixed between probe slide rail and ground electrode, one end of spring device is fixed on the base plate of high vacuum system, and the other end is connected with probe slide rail hypomere; Probe slide rail hypomere connects drop links one end, and the drop links other end is fixed by the base plate motive seal of magnetic fluid and high vacuum system.
Described probe slide rail and inclined-plane support composition static capacity probe bracket; Under the manipulation of spring device and drop links, static capacity probe bracket entirety rotates around the axis, the inclined-plane that inclined-plane supports is parallel with tested solid insulation surface, ensure that slide rail is parallel with tested solid insulation test product surface when charge measurement, thus the probe of static capacity probe is keep constant with the distance on tested solid insulation test product surface in surface charge measurement process.
Described spring device and drop links composition static capacity probe movement operating-controlling mechanism, wherein spring device provides static capacity to pop one's head near the power of tested solid insulation test product, probe slide rail and static capacity probe are pulled to inclined-plane support, probe slide rail and supporting oblique surface close contact are fitted, the distance on the probe that static capacity is popped one's head in and tested solid insulation surface is required value, and keeps constant in surface charge measurement process; To test product apply high voltage time, drop links acts on probe bracket, probe slide rail around root axis of rotation, the position be pulled to away from tested solid insulation test product that static capacity is popped one's head in.
Rotational motion outside vacuum test chamber is imported in vacuum test chamber by the magnetic force of magnetic fluid by magnetic fluid dynamic sealing technology by described high vacuum system, by rotary gear shaft mechanism, rotational motion is converted to the drop-down motion of drop links again, thus realize under the condition keeping high vacuum, control static capacity and to pop one's head in the motion done away from tested solid insulation test product.
The invention has the beneficial effects as follows by spring device, drop links, rotating shaft, gear mechanism and external control mechanical drive, manipulation vacuum test chamber inner part realize to static capacity probe away from the control near solid insulation test product, supported by inclined-plane and ensure that static capacity probe keeps constant with the distance on solid insulation surface; Realize high vacuum motive seal by Magneticfluid Seal Technique, and outer for vacuum test cavity controlled motion is imported in chamber, ensure that vacuum tightness is unaffected simultaneously.
Accompanying drawing explanation
Fig. 1 is high vacuum insulator surface measuring sonde control system schematic diagram.
Embodiment
The present invention proposes a kind of high vacuum insulator surface measuring sonde control system, is explained below in conjunction with accompanying drawing.
Figure 1 shows that a kind of structure of high vacuum insulator surface measuring sonde control system and control embodiment.Being made up of static capacity probe bracket, static capacity probe movement operating-controlling mechanism and high vacuum system of this control system.In high vacuum system, on top board high-field electrode 5 and ground electrode 7 being fixed vacuum test chamber respectively by contact conductor 10 and base plate, tested solid insulation test product 6 is placed between high-field electrode 5 and ground electrode 7; Static capacity probe 1 is fixed on probe slide rail 2 top, the lower end of probe slide rail 2 is movably fixed on the base plate of high vacuum system by rotating shaft, inclined-plane supports 8 and is fixed between probe slide rail 2 and ground electrode 7, one end of spring device 3 is fixed on the base plate of high vacuum system, and the other end is connected with probe slide rail 2 hypomere; Probe slide rail 2 hypomere connects drop links 9 one end, and drop links 9 other end is fixed by the base plate motive seal of magnetic fluid 4 with high vacuum system.
The controlling functions of this high vacuum insulator surface measuring sonde control system is divided into two kinds of controlled motion modes: static capacity probe is near tested solid insulation test product surface; Static capacity probe is away from tested solid insulation test product surface.
Probe slide rail 2 and inclined-plane support 8 composition static capacity probe brackets; The root of the probe slide rail 2 in static capacity probe bracket has rotating shaft, and probe slide rail 2 can rotate around the axis, thus drives to pop one's head in the static capacity that is connected of probe slide rail and 1 to move, realize that static capacity pops one's head in close with away from action.When probe slide rail and supporting oblique surface are fitted, static capacity probe is nearest with tested solid test product surface distance, is distance required during surface charge measurement; When slide rail of popping one's head in is vertical, static capacity probe and tested solid test product surface distance farthest, now can apply high voltage to tested solid insulation test product, and static capacity probe all can ensure safety with testing crew.
Form static capacity probe movement operating-controlling mechanism by spring device and drop links, the motion of static capacity probe and the motion of static capacity probe bracket are realized by spring device and drop links acting in conjunction:
1) spring device provides pulling force that probe slide rail is pulled to supporting oblique surface always, and now static capacity probe is near tested solid insulation test product.
2) drop links moves downward, and probe slide rail is pulled away from supporting oblique surface by the pulling force resisting spring device, and now static capacity probe is away from tested solid insulation test product; Drop links moves upward, and probe slide rail is pulled to supporting oblique surface by spring device.Drop links is controlled to move up and down by the swing handle outside cavity, and can be parked in any position at the volley.
First, static capacity probe is away from tested solid insulation test product surface: when applying high voltage to tested solid insulation test product, and static capacity probe needs away from tested solid insulation test product.Swing handle controls drop links and moves downward, then probe guide rail is pulled away from supporting oblique surface by the pulling force of connecting rod antagonism spring device, until probe guide rail is vertical, now static capacity probe is away from tested solid insulation test product, can carry out applied voltage test.
Secondly, static capacity probe is near tested solid insulation test product surface: after applying high voltage, when carrying out surface charge measurement, static capacity probe needs near tested solid insulation test product surface, and the probe of static capacity probe and the distance on tested solid insulation test product surface should keep constant.Swing handle controls drop links and moves upward, then probe guide rail is pulled to supporting oblique surface by spring device, until laminating, distance required when now static capacity probe is surface charge measurement with tested solid test product surface distance, can carry out surface charge measurement test.
Claims (4)
1. a high vacuum insulator surface measuring sonde control system, measuring sonde control system is made up of static capacity probe bracket, static capacity probe movement operating-controlling mechanism and high vacuum system; It is characterized in that, in high vacuum system, on top board high-field electrode and ground electrode being fixed vacuum test chamber respectively by contact conductor and base plate, tested solid insulation test product is placed between high-field electrode and ground electrode; Static capacity probe is fixed on probe slide rail top, the lower end of probe slide rail is movably fixed to high vacuum by rotating shaft and moves on the base plate of system, inclined-plane is supported and fixed between probe slide rail and ground electrode, one end of spring device is fixed on the base plate of high vacuum system, and the other end is connected with probe slide rail hypomere; Probe slide rail hypomere connects drop links one end, and the drop links other end is fixed by the base plate motive seal of magnetic fluid and high vacuum system.
2. a kind of high vacuum insulator surface measuring sonde control system according to claim 1, is characterized in that, described probe slide rail and inclined-plane support composition static capacity probe bracket; Under the manipulation of spring device and drop links, static capacity probe bracket entirety rotates around the axis, the inclined-plane that inclined-plane supports is parallel with tested solid insulation surface, ensure that slide rail is parallel with tested solid insulation test product surface when charge measurement, thus the probe of static capacity probe is keep constant with the distance on tested solid insulation test product surface in surface charge measurement process.
3. a kind of high vacuum insulator surface measuring sonde control system according to claim 1, it is characterized in that, described spring device and drop links composition static capacity probe movement operating-controlling mechanism, wherein spring device provides static capacity to pop one's head near the power of tested solid insulation test product, probe slide rail and static capacity probe are pulled to inclined-plane support, probe slide rail and supporting oblique surface close contact are fitted, the distance on the probe that static capacity is popped one's head in and tested solid insulation surface is required value, and keeps constant in surface charge measurement process; To test product apply high voltage time, drop links acts on probe bracket, probe slide rail around root axis of rotation, the position be pulled to away from tested solid insulation test product that static capacity is popped one's head in.
4. a kind of high vacuum insulator surface measuring sonde control system according to claim 1, it is characterized in that, rotational motion outside vacuum test chamber is imported in vacuum test chamber by the magnetic force of magnetic fluid by magnetic fluid dynamic sealing technology by described high vacuum system, by rotary gear shaft mechanism, rotational motion is converted to the drop-down motion of drop links again, thus realize under the condition keeping high vacuum, control static capacity and to pop one's head in the motion done away from tested solid insulation test product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510142803.5A CN104777373B (en) | 2015-03-27 | 2015-03-27 | A kind of high vacuum insulator surface measuring probe control system |
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| CN201510142803.5A CN104777373B (en) | 2015-03-27 | 2015-03-27 | A kind of high vacuum insulator surface measuring probe control system |
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| CN104777373B CN104777373B (en) | 2017-10-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106226609A (en) * | 2016-09-28 | 2016-12-14 | 南方电网科学研究院有限责任公司 | Insulating material surface charge measuring device |
| CN108445310A (en) * | 2018-06-05 | 2018-08-24 | 沈阳工业大学 | A kind of polymer surfaces charge and trap level characteristic measuring device and method |
| CN108490278A (en) * | 2018-05-02 | 2018-09-04 | 沈阳工业大学 | A kind of miniaturization disc insulator surface charge three-dimensional measuring apparatus and method |
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2015
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| JP2006349414A (en) * | 2005-06-14 | 2006-12-28 | Canon Inc | Device and method for measuring charged amount distribution |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226609A (en) * | 2016-09-28 | 2016-12-14 | 南方电网科学研究院有限责任公司 | Insulating material surface charge measuring device |
| CN108490278A (en) * | 2018-05-02 | 2018-09-04 | 沈阳工业大学 | A kind of miniaturization disc insulator surface charge three-dimensional measuring apparatus and method |
| CN108490278B (en) * | 2018-05-02 | 2023-10-27 | 沈阳工业大学 | Miniaturized basin-type insulator surface charge three-dimensional measurement device and method |
| CN108445310A (en) * | 2018-06-05 | 2018-08-24 | 沈阳工业大学 | A kind of polymer surfaces charge and trap level characteristic measuring device and method |
| CN108445310B (en) * | 2018-06-05 | 2023-10-27 | 沈阳工业大学 | Device and method for measuring surface charge and trap energy level characteristics of polymer |
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| CN104777373B (en) | 2017-10-10 |
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